Tree pollen spikes to highest level since 2010

Today’s tree pollen count surged to 2870.61 grains per cubic meter, classified as VERY HIGH according to the U.S. Army Centralized Allergen Extract Laboratory.

“Windy and very warm conditions, along with the sunshine yesterday afternoon were favorable conditions [for the spike],” writes Susan Kosisky, the allergen lab’s director.

Here are two remarkable statistics about this count:

  • It is the highest count since 2010
  • It exceeds the highest count in 12 of the last 15 tree pollen seasons
(U.S. Army Centralized Allergen Extract Laboratory) (U.S. Army Centralized Allergen Extract Laboratory)

Kosisky says oak, pine, sweetgum, mulberry, ash and birch contributed heavily to the count.

Counts for grasses, weed, and mold spores were reported to be low.

Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
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Jason Samenow · April 19, 2013